Do you need extra zippers for your Proclick Spines. We carry these extra Proclick zippers so that you can always have a Proclick tool on hand. Or you can give zippers to your sales people allowing them to edit their reports in the field. These zipper tools are fully compatible with the New GBC Proclick Pronto and the smaller GBC manual binding systems. Either way, choose from three different sizes: Small (5/16"), Medium (1/2") and Large (5/8").